public function actionBulkDelete()
 {
     $ids = Yii::$app->request->getBodyParam('id', []);
     $models = Version::findAll(['id' => $ids]);
     foreach ($models as $model) {
         $model->delete();
     }
     return $this->redirect(ArrayHelper::getValue(Yii::$app->request, 'referrer', ['index']));
 }